192004736 - E5020 ENGINE COOLING - FUNCTIONAL DESCRIPTION

Functional description

Activation of the radiator fan N11 is managed directly by the electronic circuit M150 located on the actual radiator:

• the power supply reaches connector A from a line protected by fuse F6 of engine bay control unit B1;
• Ignition-operated power supply (15/54) reaches pin 1 of connector C from the ignition-operated line (15/54) protected by fuse F16 of engine bay control unit B1;
• the control signal (earth) - to pin 2 of connector C - comes from engine bay control unit M10 , pin 62 of connector A.

If the engine coolant temperature reaches a certain temperature stage, or the fan linear sensor K120 signals to the control unit M10 - pin 42 of connector A - that a certain pressure stage has been reached, then the control unit M10 sends a signal - from pin 14 of connector A - to pin 2 of connector C of M150 which operates the fan N11 .Linear sensor K120 receives a power supply and reference earth from the engine management control unit M10 , pins 63 and 25 of connector A.